Penggunaan dan Pembuatan Fungsi kalkulus di RStudio

Matkul : Kalkulus, Dosen Pengampu : Prof. Dr. SUHARTONO, M.Kom

---

Contoh fungsi kalkulus 1 variabel

luas_persegi <- function(sisi) {
  sisi^2
}

Mengisi variabel funsgi

test1_variabel = luas_persegi(5)
test1_variabel

## [1] 25

Contoh fungsi kalukulus 2 variabel

luas_segitiga <- function(alas, tinggi) {
  alas * tinggi / 2
}

Mengisi variabel fungsi

luas_segitiga(6,12)

## [1] 36

Contoh fungsi kalkulus 3 variabel

volume_balok <- function(panjang, lebar, tinggi) {
  panjang * lebar * tinggi
}

Mengisi variabel fungsi

volume_balok(3,4,6)

## [1] 72

Mencoba Fungsi Eksponensial dengan grafik Menggunakan Library Mosaic

Fungsi awal :

drug_remaining <- function(dose, duration, time_constant) {
  dose * exp(- duration / time_constant)
}

Coba fungsi

drug_remaining(dose = 100, duration = 10, time_constant = 4)

## [1] 8.2085

Visualisasi grafik

library(mosaic)

## Registered S3 method overwritten by 'mosaic':
##   method                           from   
##   fortify.SpatialPolygonsDataFrame ggplot2

## 
## The 'mosaic' package masks several functions from core packages in order to add 
## additional features.  The original behavior of these functions should not be affected by this.

## 
## Attaching package: 'mosaic'

## The following objects are masked from 'package:dplyr':
## 
##     count, do, tally

## The following object is masked from 'package:Matrix':
## 
##     mean

## The following object is masked from 'package:ggplot2':
## 
##     stat

## The following objects are masked from 'package:stats':
## 
##     binom.test, cor, cor.test, cov, fivenum, IQR, median, prop.test,
##     quantile, sd, t.test, var

## The following objects are masked from 'package:base':
## 
##     max, mean, min, prod, range, sample, sum

t = 0:30
plotFun (drug_remaining(dose=100, time_constant = 4, duration =t) ~ t, t.lim = range(0,30))

Daftar pustaka : https://dtkaplan.github.io/RforCalculus/representing-mathematical-functions.html#r-language-functions